Pressure-controlled valve.



W. F. TREIBER & E. L. BULKLEY.

PRESSURE CONTROLLED VALVE.

APPLICATION man JUNE 14, 1912.

1,145,043. Patented July 6, 1915.

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PRESSURE CONTROLLED VALVE.

APPLICATION FILED .IUNE'H, I912.

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WILLIAM F. TREIBER, or comvme, AND EMEiaY L. BULKLEY, or PAINTED rosmg'miw YORK, 'AssIeNons '10 INGERSOLL-RAND COMPANY, on NEW YORK, Y., A con PORATION or NEW 'JERsEY.

PRESSURE-CONTROLLED VALVE.

To allwhom it may concern:

Be it known TREIBEB, a citizen of, the United States, re.- siding at Corning, in the county of Steuben and State of New York, and EMERY L. BULKLEY, a citizenof the United States, residing at Painted Post, in the county of Steuben and State of New York, have invented certain new and useful Improvements in Pressure-Controlled Valves, of which the following is a specification.

This invention relates to pressure con-:-

trolled valves, and more particularly to valves of this typewhich are designed to operate at a predetermined pressure in a compressor'receiver or like fluid receptacle to admit fluid pressure to a fluid actuated regulating means, and to release this fluid pressure when the pressure in the receiver or receptacle falls below a'-" 'predetermined amount.

The object of the present invention is to produce a valve of simple construction 1 which will operate quickly and positively when the desired pressure in the fluid re ceptacle is reached and will return with equal quickness and positiveness to its original position when the pressure falls below a desired amount. p The construction herein described and claimedcan be used with any form of regulating mechanism wherein the regulating is by movement of a pressure actuated mechanism such as a piston, diaphragm or like device which is moved. from normal -.position by pressure and returned thereto when the pressure is removed; for instance, the present valve may be used with various forms of pressure actuated discharge line or inlet regulating unloaders for compressors, for pressure actuated belt shifters and electric switches and like purposes.

For the purposes of description a practical embodiment of the valve is here'shown, in connection with a compressor intake closing unloader.

In the-drawings: Figure 1 shows aside elevationof a compressor and an-inlet unloading valve controlled by a valve embodyingour invention. Fig; 2 shows ajvertical Specification of Letters ia'tent.

that we, WILLIAM Patented July 6, 1915.

Application filed June 14, 1912. Seria1 No.,703,644.

inlet closing valve and the controlling valve. Fig-3 is an elevation showing a detailof the controlling valve.

As shown-the complete unloading mechanism comprises the unloader proper A and the controlling valve B. i

The unloader proper consists of .a casing 1 having an inlet-pipe 2 and a discharge pipe 3 to the compressor. In the casing opposite the opening of the-inlet pipe'is a valve cylinder 4 in which moves 'a valve pist0n'5, to the head of which is secured a beveled valve disk 6.

In closing, this valve disk bears against a beveled valve seat 7 in,the inlet opening.

The back part of the cylinder communicates withthe controlling valve B through a pipe 8 which leads to a valve chest 9 in which is positioned a cylindrical valve 10 provided with oppositely beveled valve surfaces 11 and 12 which are so placed as to position against beveled seats 13 and 14 in the valve of the shape of the valve shank. The cham- 'ber 18 is always open to receiver pressure through passage 20 and .a pressure inlet pipe 21 which leads from a dirt and water collector of ordinary construction-22 connected to the discharge pipe 22 of the compressor, or to the receiver (not shown). From chamber 19 a leak. vent 23 leads to the atmosphere, its effective sizebeing controlled by an adjustable needle valve 24. From this chamber a passage 25 leads through; a nozzle 26 to a second closed bore in the casing which is likewise divided into two chambers 27 and 28 by a. diaphragm 29 which'may seat against the nozzle closing it. The chamber 27 is likewise connected with the dirt collector-22 by a pipe 30. Contacting with the diaphragm on the opposite side from the nozzle is a cup shaped plunger 31 which slides in a cylindrical bore 32 and is held against the diaphragm 29 by a spring 33 the tension of which can be adjusted by a screw 34:. In order to give the plunger a sudden rather than a gradual motion when the pressure in chamber reaches a certain amount a friction plug 35 is provided which slides in a bore 36 in the casing and is held against the plunger by a spring 37. The tension of the spring 37 can be varied by the tension screw 38, and in this way the drop in pressure necessary to allow the valve 10 to return to its original position can be varied.

Leading from chamber 27 to chamber 19 is a leak passage 39 which contains a valve seat 40 against which seats a screw 41 forming a valve which can be opened to put smaller on this side and diaphragm 1? will 'be forced over. \Vhen diaphragm 17 is thus 7 forced over, valve 10 is moved rapidly across its path of travel and closes exhaust opening 15, at the same time giving a free opening between chamber 18 and the valve chest 9, thus admitting air at receiver pressure to pipe 8. This will promptly force up piston 5 and valve disk 6 against valve seat 7 completely closing inlet pipe 2 of the compressor and positively shutting oifthe intake without allowing any vibration or fluttering of valve disk 6, such as frequently occurs when the regulating valve allows pressure to build up gradually instead of suddenly in cylinder 4. When the pressure in the receiver falls the diaphragm 29 will again close the nozzle, pressure in chamber will leak out through port 23 which is always more or less open to the atmosphere,

and the receiver pressure in chamber 18 will carry the valve 10 back to its original position closing off communication between the receiver and the unloader cylinder and opening the unloader cylinder to atmospheric pressure through the exhaust opening 15. Due to the rapid action of valve 10 when returning to its original position. the movement of valve disk 6 when opening the intake will again be prompt and positive.

If it is desired to unload the compressor by hand, the valve in the passage 39 can be opened allowing the valve 10 .to be thrown at any pressure of the receiver.

It is to be understood that the present showing and description discloses only one specified modification of our invention and other forms and modifications are included in the spirit and scope of the invention as expressed in the claims.

What We claim is:

1. A pressure controlled valve for use with fluid actuated regulating mechanism comprising a closed bore divided by a diaphragm into two chambers, adjustable means for admitting fluid at a predetermined pressure to one of said chambers, a valve chest, a passage from said valve chest for connection with a regulating mechanism, a pressure exhaust opening in said valve chest, a passage from said valve chest to said second chamber having an inlet opening in said valve chest, a valve adapted to control said inlet opening and said exhaust opening, said valve being attached to said diaphragm, and a single inlet passage for admitting fluid under pressure to said second chamber and said inlet opening.

2. In a pressure controlled valve for use with fluid actuated regulating mechanism, a valve chest, a passage from said valve chest for connection with a regulating mechanism, an exhaust opening in said valve chest, an inlet passage to said valve chest, a valve for controlling said exhaust opening and inletpassage, a stem on said valve passing loosely through said inlet passage, an actuating diaphragm attached to said valve stem, 2. fluid admission passage for continuously admitting fluid to one side of said diaphragm and to said inlet passage, and means to admit fluid at a predetermined pressure to the opposite side of the diaphragm.

3. In a pressure controlled valve for use with fluid actuated regulating mechanism, comprising a valve chest having a passage for connection with said regulating mechanism, said valve chest having also pressure inlet and exhaust openings therein, a valve in said valve chest forconnecting said regulating mechanism with either said inlet or said exhaust opening, a motor for operat ing said valve, a valve for admitting fluid to said motor, a fluid motor for opening said valve at a predetermined fluid pressure, and

adjustable means for retarding the action of said motor.

4. In a pressure controlled valve for use with fluid actuated regulating mechanism, comprising a valve chest having a passage for connection with said regulating mechanism, said valve chest having also pressure inlet and exhaust openings therein, a valve in said valve chest for connectmg said regulating mechanism With either said inlet or retard the action of said second motorand said exhaust opening, a motor for operatsaid resilient element.

ing said Valve a valve for admitting fluid to said motor: a fluid motor for opening said valve at a predetermined fluid pressure,

a resilient element for closing said valve, Witnesses: and a spring pressed plug frictionally en- CLAUDE PITTS, gaging a surface of said resilient element to JOSEPH W. JONES. 

